import java.util.Scanner;

public class calendar {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("请输入月份");
        int method = input.nextInt();
        switch (method) {
            case 3:
            case 4:
            case 5:
                System.out.println("夏天");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println("秋天");
                break;
            case 1:
            case 2:
            case 12:
                System.out.println("冬天");
                break;
            default:
                System.out.println("请输入正确的月份");
        }
    }
}
